Ratchet-drill.



No. 787,284. PATENTED APR. ll, 1905.

P. C. TORRANCE.

.RATGHET DRILL.

APPLIUATION FILED JULY 22, 1903.

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Patented April 1 1, 1905.

UiaiTeo STATES PATENT @Fisica FRANVIS CLAUDE TORRANCE, OF ERIE,PENNSYLVANIA.

RATCHET-DRILL.

SPECIFICATION forming part of Letters Patent No. 787,234, dated April11, 1905.

Application filed July 22,1903. Serial Noy 16615181 le it known that l.FRANCIS CLAUDE Tounixxcic, a citizen of the United States, residing' atErie. in the countv of Erie and State of l')ennsnvlvania, have inventednew and useful lmprovements in l\atcl1et-.l)i'ills, of which thefollowing is a specification.

'lhis invention relates to ratchet-drills.

The objects of the invention are to improve and sim plifv theconstruction of such devices.

\\'ith the foregoingl and other minor objects in view, which will appearas the description proceeds, the invention resides in the particularcombination and arrangement of parts and in the precise details ofconstruction hereinafter described and claimed as a practical embodimentthereof.

ln the accompanying drawings, Figure 1 is a central longitudinal sectionthrough a ratchet-drill constructed in accordance with the presentinvention. Fig'. Q is a side elevation of the same, showing the drilladapted for use as a .louble-action drill.

Like reference-numerals desig'nate corresponding parts in all thefigures of the drawing's.

The drill contemplated in this invention comprises, essentially, acentral longitudinal shaft or arbor 1, provided at one end with a socket'i to receive the sha-nk of the drill-point, while the opposite end ofsaid shaft or arbor is provided with an intei'nally-threaded bore 3, inwhich is received the eXteriorly-threaded shank 1 of the feed-screw andcentering device, said shank being` provided at one end with acentering' head provided with a point t3 and having' its outer faceprovided with a series of w rench-eng'ag'ing surfaces T and alsoprovided with a series of sockets or holes 8 to receive aniuljusting-lever, by means of which the feed-screw may be operated foradvancing the shaft or arbor 1 and the drill carried thereb'v.

At or near the opposite ends of the shaft 1 are end collars 9, which aremade fast upon the shaft bv means of set-screws 9 or any otherconvenient means. Extending' centrally around the shaft or arbor 1 is asleeve or collar 10, forming a pinion-carrier, the same bel l l ing'provided with suitable journals 10", upon which are rotatably mountedpinions 11, the same being received in slots 12, formed in the collar1l), as shown in Fig'. .1. Upon opposite sides of the central collar orpinion-carrier .10 and between said carrier and the end collars 9 areinterposed dog-carrying sleeves 13, the same being free to rotate aroundthe shaft 1 when the device is used as a double-action drill. The outersurfaces of the sleeves 13 are recessed, as shown at 11, to receiveratchetwheels 15, having a fixed relation to the shaft or arbor 1, beingpreferablvY secured to the fixed end collars t) b v means of screws 15".The sleeves 13 are provided with openings leading' inward from theirperipheries, and each of said openings has mounted therein a dog' Y16,which is normally pressed inward by means of a spring 17, coiled aroundthe dog' and bearing at its outer e'nd against a plugltv, pre ferablyscrewed into the said opening', as clearlyY shown in Fig'. 1. 'lhc innerends of the dogs 16 engage the teeth of the ratchet-wheels 15 to turnsaid ratchet-wheels in one direction or the other, according' to thedirection in which the shaft or arbor is to be rotated.

Secured to the inner faces of the sleeves 13 bv means of screws 13 aregear-wheels 19, which mesh at dianietricallv opposite points with thepinions 11. As one sleeve 13 is turned in one direction the other sleeve13, through the medium of the gear-wheels 19 and pinions 11, is turnedin an opposite direction, and as said sleeves 13 connuunicate theirmotion through the ratchet devices to the shaft or arbor it will be seenthat said shaft is turned in whichever direction the sleeves 13 arerotated.

One of the sleeves 13 is provided with a socket or opening' 2O toreceive an operating lever or handle Q1, which constitutes thedouble-action lever of the drill. The centrallyarranged sleeve or pinioncarrier 10 is also provided with a similar socket 22 to receive asingle-action lever or handle 23, and said lever or handle is madesomewhat longer than the lever 2-1, so that it ma)v be secured, by meansof a coupling' device 24;, to an adjacently-arranged brace or beam 25,thus enabling the pinion-carrier to be held stationary, while thesleeves 13 are rotated in opposite directions at each side thereof.

From the foregoing description it will be seen that by operating thesingle-action lever 23 both of the sleeves 13, as well as thepinioncarrier 10, are simultaneously rotated in the same direction. Byfastening the pinion-carrier in the manner shown in Fig. 2 and holdingsaid pinion-carrier stationary and by operating one of the sleeves 13both of the sleeves 13 are caused to rotate and impart motion to theshaft or arbor of the drill, thus producing a double action and enablingthe operator to drill more rapidly. As the hole is drilled the drill maybe advanced by turning or adjusting the feed-screw 4 in a manner whichwill be readily understood.

I wish it to be understood that I attach importance to the constructionof the collars, sleeves, and pinion-carrier, whereby they form acomplete inclosing casing for the operating mechanism of the structure,thereby excluding foreign substances from coming in contact with saidmechanism.

Having thus described the invention, what I claim as new is- Aratchet-drill comprising an arbor having l feedinu means a air of searated collars on said arbor, screws rigidly connecting said collarswith said arbor, a gear-wheel detachably connected with each ot' saidcollars, a pair of dog-carrying sleeves surrounding said arbor, each ofthe sleeves being recessed to receive the detachable gear-wheel on theadjacent collar, movable dogs in each of said sleeves, coilspringssurrounding said dogs, removable plugs in said sleeves against which thecoilsprings bear, a gear-wheel secured to each of said dog-carryingsleeves, a pinion-carrier surrounding said arbor between saiddog-carrying sleeves, said collars, sleeves and pinioncarrier beingconstructed and arranged to form a complete inclosing casing for theoperating parts, pinions journaled on the periphery of saidpinion-carrier and meshing with gear-wheels on the dog-carrying sleeves,a lever for rotating said dog-carrying sleeves, and a lever for rotatingsaid pinion-carrier, substantially as specified.

In testimony whereoil 1 affix my signature in presence of two witnesses.

FRANCIS CLAUDE TORRANCE. lVitnesses:

FRANK TORRANCE, SIMON REED.

